Examples of java.text.DateFormatSymbols

java.text.DateFormatSymbols
DateFormatSymbols is a public class for encapsulating localizable date-time formatting data, such as the names of the months, the names of the days of the week, and the time zone data. DateFormat and SimpleDateFormat both use DateFormatSymbols to encapsulate this information.
Typically you shouldn't use DateFormatSymbols directly. Rather, you are encouraged to create a date-time formatter with the DateFormat class's factory methods: getTimeInstance, getDateInstance, or getDateTimeInstance. These methods automatically create a DateFormatSymbols for the formatter so that you don't have to. After the formatter is created, you may modify its format pattern using the setPattern method. For more information about creating formatters using DateFormat's factory methods, see {@link DateFormat}.
If you decide to create a date-time formatter with a specific format pattern for a specific locale, you can do so with:
```
 new SimpleDateFormat(aPattern, DateFormatSymbols.getInstance(aLocale)). 
```
DateFormatSymbols objects are cloneable. When you obtain a DateFormatSymbols object, feel free to modify the date-time formatting data. For instance, you can replace the localized date-time format pattern characters with the ones that you feel easy to remember. Or you can change the representative cities to your favorite ones.
New DateFormatSymbols subclasses may be added to support SimpleDateFormat for date-time formatting for additional locales. @see DateFormat @see SimpleDateFormat @see java.util.SimpleTimeZone @version 1.49 12/19/07 @author Chen-Lieh Huang

        // Test whether the "local pattern characters" are what we
        // are expecting - Locale.GERMAN and Locale.GERMANY, Locale.FRENCH all
        // returned the standard "English" pattern characters on my machine
        // for JDK 1.4 (JDK 1.3 was OK). The Austria/German locale was OK though
        String expectedChars = "GuMtkHmsSEDFwWahKzZ";
        DateFormatSymbols localizedSymbols = new DateFormatSymbols(localizedLocale);
        String localChars    = localizedSymbols.getLocalPatternChars();


        // different JDK versions seem to have different numbers of pattern characters 
        int lth = localChars.length() > expectedChars.length() ? expectedChars.length() :
                     localChars.length() < expectedChars.length() ? localChars.length() : expectedChars.length();
        validLocalDateSymbols = expectedChars.substring(0, lth).equals(localChars.substring(0, lth));

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    if (response.wasRendered(key))
    {
      return;
    }


    DateFormatSymbols dfSymbols = DateFormatSymbols.getInstance(locale);
    if (dfSymbols == null)
    {
      dfSymbols = new DateFormatSymbols(locale);
    }


    Map<String, Object> i18nVariables = new LinkedHashMap<String, Object>();
    setWidgetProperty(i18nVariables, "MONTHS_SHORT", filterEmpty(dfSymbols.getShortMonths()));
    setWidgetProperty(i18nVariables, "MONTHS_LONG", filterEmpty(dfSymbols.getMonths()));
    setWidgetProperty(i18nVariables, "WEEKDAYS_MEDIUM",
      filterEmpty(dfSymbols.getShortWeekdays()));
    setWidgetProperty(i18nVariables, "WEEKDAYS_LONG", filterEmpty(dfSymbols.getWeekdays()));


    i18nVariables.put("START_WEEKDAY", getFirstDayOfWeek(locale));


    if (Locale.SIMPLIFIED_CHINESE.equals(locale) || Locale.TRADITIONAL_CHINESE.equals(locale))
    {
      setWidgetProperty(i18nVariables, "WEEKDAYS_1CHAR",
        filterEmpty(substring(dfSymbols.getShortWeekdays(), 2, 1)));
      i18nVariables.put("WEEKDAYS_SHORT",
        filterEmpty(substring(dfSymbols.getShortWeekdays(), 2, 1)));
    }
    else
    {
      setWidgetProperty(i18nVariables, "WEEKDAYS_1CHAR",
        filterEmpty(substring(dfSymbols.getShortWeekdays(), 0, 1)));
      setWidgetProperty(i18nVariables, "WEEKDAYS_SHORT",
        filterEmpty(substring(dfSymbols.getShortWeekdays(), 0, 2)));
    }


    StringBuilder i18n = new StringBuilder(key);
    i18n.append('=');
    appendMapping(i18nVariables, i18n);

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        if (request.getAttribute(LOCALIZATION_CONFIGURED_FLAG) == null)
        {
            JSONObject spec = new JSONObject();


            DateFormatSymbols symbols = new DateFormatSymbols(locale);


            spec.put("months", new JSONArray(symbols.getMonths()));


            StringBuilder days = new StringBuilder();


            String[] weekdays = symbols.getWeekdays();


            for (int i = Calendar.SUNDAY; i <= Calendar.SATURDAY; i++)
            {
                days.append(weekdays[i].substring(0, 1));
            }

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     * Returns an int to represent the given month (ex : 1 for January)
     * Returns -1 if the given string doesn't match any month
     * Try to match with complete name and then with short names
     */
    private static int computeMonth(String ss, Locale loc) {
        DateFormatSymbols sym = new DateFormatSymbols(loc);
        String[] monthsArray = sym.getMonths();
        String[] shortMonthsArray = sym.getShortMonths();
        for (int i=0; i<monthsArray.length; i++) {
            if (StringUtil.equalsIgnoreCase(monthsArray[i], ss)) {
                return i+1;
            }
        }

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   String[] shortMonths;


   public DateTimeDateFormat()
   {
      super();
      shortMonths = new DateFormatSymbols().getShortMonths();
   }

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    // check that changing the short weekdays does work...
    SimpleDateFormat sdf = new SimpleDateFormat("E", Locale.UK);
    sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
    Date jan1_2005 = new Date(1104537600000L);
    harness.check(sdf.format(jan1_2005), "Sat");
    DateFormatSymbols s = sdf.getDateFormatSymbols();
    s.setShortWeekdays(new String[] {"-", "S", "M", "T", "W", "T", "F", "S"});
    // remember s is just a copy of the original
    sdf.setDateFormatSymbols(s);
    harness.check(sdf.format(jan1_2005), "S");
    
    // check null argument - it isn't mentioned in the spec that this

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    // date formatter...
    SimpleDateFormat sdf = new SimpleDateFormat("E", Locale.UK);
    sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
    Date jan1_2005 = new Date(1104537600000L);
    harness.check(sdf.format(jan1_2005), "Sat");
    DateFormatSymbols s = sdf.getDateFormatSymbols();
    s.setShortWeekdays(new String[] {"-", "S", "M", "T", "W", "T", "F", "S"});
    harness.check(sdf.format(jan1_2005), "Sat");
  }

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    // check null argument - it isn't mentioned in the spec that this
    // should throw a NullPointerException, but that is such common
    // behaviour elsewhere that I'm assuming this is the expected 
    // result
    DateFormatSymbols dfs = new DateFormatSymbols(Locale.UK);
    try
    {
      dfs.setWeekdays(null);
      harness.check(false);
    }
    catch (NullPointerException e)
    {
      harness.check(true);

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    f1 = new SimpleDateFormat("yyyy");
    harness.check(!f1.equals(f2));                 // check 2
    f2 = new SimpleDateFormat("yyyy");
    harness.check(f1.equals(f2));                  // check 3
    
    DateFormatSymbols dfs1 = new DateFormatSymbols(Locale.GERMAN);
    DateFormatSymbols dfs2 = new DateFormatSymbols(Locale.ENGLISH);
    f1 = new SimpleDateFormat("yyyy", dfs1);
    f2 = new SimpleDateFormat("yyyy", dfs2);
    harness.check(!f1.equals(f2));                 // check 4
    f2.setDateFormatSymbols(dfs1);
    harness.check(f1.equals(f2));                  // check 5

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  {
    harness.checkPoint("SimpleDateFormat(String, DateFormatSymbols)"); 


    // bug 4099975 suggests that the DateFormatSymbols argument is 
    // cloned - check for this behaviour
    DateFormatSymbols s = new DateFormatSymbols(Locale.FRANCE);
    SimpleDateFormat f = new SimpleDateFormat("yyyy", s);
    harness.check(f.getDateFormatSymbols() != s);
    harness.check(f.getDateFormatSymbols().equals(s));


    // check null 'pattern' argument
    try
    {
      /* SimpleDateFormat f = */ new SimpleDateFormat(
        null, new DateFormatSymbols()
      );   
      harness.check(false);
    }
    catch (NullPointerException e)
    {
      harness.check(true);   
    }


    // check null 'formatData' argument
    try
    {
      /* SimpleDateFormat f = */ new SimpleDateFormat(
        "yyyy", (DateFormatSymbols) null
      );   
      harness.check(false);
    }
    catch (NullPointerException e)
    {
      harness.check(true);   
    }
    
    // check invalid argument
    try
    {
      /* SimpleDateFormat f = */ new SimpleDateFormat(
        "ZYXWVUT", new DateFormatSymbols()
      );   
      harness.check(false);
    }
    catch (IllegalArgumentException e)
    {

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